diff --git a/composer.json b/composer.json
index 48898cc..a3d7e06 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
         "php": "~8.3.0 || ~8.4.0"
     },
     "require-dev": {
-        "phpstan/phpstan": "^2.1.17",
+        "phpstan/phpstan": "^2.1.18",
         "phpstan/phpstan-phpunit": "^2.0.6",
         "phpstan/phpstan-strict-rules": "^2.0.4",
         "phpunit/phpunit": "^12.2.7",
diff --git a/tests/ErrorHandlerTest.php b/tests/ErrorHandlerTest.php
index 5cf99c0..fba2b03 100644
--- a/tests/ErrorHandlerTest.php
+++ b/tests/ErrorHandlerTest.php
@@ -113,7 +113,7 @@ public function testHandleCliException(): void
         $this->errorHandler->exceptionHandler($this->exception);
 
         \fseek($memoryStream, 0);
-        $output = (string) \stream_get_contents($memoryStream);
+        $output = \stream_get_contents($memoryStream);
         self::assertStringContainsString($this->exception->getMessage(), $output);
     }